Coos Bay Field Gulf Coast Coal Region Williston Basin Illinois Basin Forest City Basin Northern Appalachian Basin Powder River Basin Uinta Basin Cherokee Platform San Juan Basin Central Appalachian Basin Michigan Basin Greater Green River Basin Black Warrior Basin North Central Coal Region Arkoma Basin Denver Basin Southwestern Coal Region Piceance Basin Big Horn Basin Wind River Basin Raton Basin Black Mesa Basin Terlingua Field Kaiparowits Basin Deep River Basin SW Colorado Coal Area Park Basin Hannah-Carbon Basin Wyoming Overthrust Coalbed Methane Fields, Lower 48 States 0 200 400 100 300 Miles ± Source: Energy Information Administration based on data from USGS and various published studies Updated: April 8, 2009 Coal Basins, Regions & Fields Coalbed Methane Fields !